131results about How to "Improved thermal dimensional stability" patented technology

The invention discloses a filtering material and its application. The filtering material comprises a three-layer structure of a filtering surface layer, a non-filtering surface layer, and an intermediate fabric enhancement layer, wherein, the filtering surface layer is a fibrous mesh comprising 10-90 wt% of heat resistant fibers with the average diameter of below 10 mum and 10-90 wt% of heat resistant fibers with the average diameter of 10-20 mum, the non-filtering surface layer is a fibrous mesh comprising deformed section heat resistant fibers with the average diameter of 10-200 mum, and the intermediate fabric enhancement layer is a fibrous mesh comprising heat resistant fibers. The filtering material disclosed herein has good filtering performance, high mechanical strength, little loss of pressure, and long cycle time, and can improve the service life of the filtering material.

This invention relates to a formulation with the addition of low density additives of volcanic ash, hollow ceramic microspheres or a combination of microspheres and volcanic ash or other low density additives into cementitious cellulose fiber reinforced building materials. This formulation is advantageously lightweight or low density compared as compared to current fiber cement products without the increased moisture expansion and freeze-thaw degradation usually associated with the addition of lightweight inorganic materials to fiber cement mixes. The low density additives also give the material improved thermal dimensional stability.

The invention relates to the technical field of the lithium ion battery diaphragm production, and specifically relates to a SiO2-PS nuclear shell structure ceramic diaphragm coating. A preparation method of the SiO2-PS nuclear shell structure ceramic diaphragm coating comprises the following steps: after modifying the monodispersed nanometer SiO2-particle in-situ grafted gamma-methacryloyloxy trimethoxy silane (MPS) prepared through the St-ber method, coating the monodispersed nanometer modified SiO2 particles by adopting the polyvinyl pyrrolidone ethanol solution and styrene-azodiisobutyronitrile mixed solution, thereby forming the nuclear shell structure with stable combination effect, and preparing the SiO2-PS nuclear shell structure ceramic diaphragm coating slurry; the nuclear shell SiO2-PS composite particle with good dispersibility can be uniformly dispersed in the coating slurry system and cannot produce excessive agglutination, and can form the coating not hindering the polyolefin porous diaphragm gap after being coated on the polyolefin porous diaphragm, and has good combining effect with the polyolefin porous diaphragm, and the membrane has good mechanical performance onthe whole; the diaphragm has stable membrane form under high-temperature state, the SiO2 of the nuclear layer is free from ceramic powder falling and blocking diaphragm duct under the coating of theglass-state polymer when the heat shrinkage phenomenon of the diaphragm caused by the high temperature is effectively blocked, and the security of the lithium ion battery is improved.

The invention provides waterborne ceramic slurry for a lithium ion battery and a preparation method of a composite separator from the waterborne ceramic slurry. The waterborne ceramic slurry is prepared from inorganic powder, an adhesive, a dispersant, an aid and deionized water. The invention further provides a preparation method of the waterborne ceramic composite separator. Compared with oily ceramic coated lithium ion battery separators, the composite separator has good wettability, heat resistance and adhesion performance, a coating contains inorganic powder with uniform particle sizes, the safety performance of the battery is effectively improved, and the composite separator cannot cause pollution to the environment and has a good application prospect.

The invention discloses a fiber internally-reinforced wood plastic product with high impact resistance, high folding resistance and high size stability and a preparation method thereof. The product is formed through co-extrusion of a core layer and a surface layer; the core layer is composed of core layer polymer resin, fibers, plasticizer, a lubricating agent, antioxygen, core layer stabilizer and an interface modifying agent; the surface layer is composed of surface layer polymer resin, wood flour, surface layer stabilizer, calcium carbonate, a foaming agent, a foaming conditioning agent and plasticization stabilizer. The preparation method includes the steps that 1, surface layer raw materials are mixed to be uniform; 2, melt extrusion granulation is conducted, and surface layer particle materials are obtained; 3, the dried core layer resin is uniformly mixed with other core layer raw materials; 4, melt extrusion granulation is conducted, and core layer particle materials are obtained; 5, the surface layer particle materials and the core layer particle materials are subjected to co-extrusion, and the fiber internally-reinforced wood plastic product is obtained; or, the uniformly mixed surface layer particle materials and core layer particle materials are subjected to co-extrusion, and the fiber internally-reinforced wood plastic product is obtained. The wood plastic product has good impact resistance and bending resistance and is good in heated size stability.

The invention discloses a high-temperature-resistant polymer modified ceramic diaphragm and an application thereof. The high-temperature-resistant polymer modified ceramic diaphragm comprises a porousbase membrane, and at least one surface of the porous base membrane is coated with a ceramic layer; and a high-temperature-resistant polymer layer is arranged on the surface and in the interior of pores of the ceramic layer, in the interior of pores of the porous base membrane, and on the surface not coated with the ceramic layer in an in-situ polymerization manner. The high-temperature-resistantpolymer modified ceramic diaphragm has relatively high thermal stability. Through the in-situ polymerization method of pyrrole, the thiophene and the aniline monomer, a high-temperature-resistant polymer protection layer is formed on the surface and in the interior of pores of the ceramic layer, on the surface of the porous base membrane, and in the pores in an in-situ coating manner, so that theceramic layer, the polymer layer and the base membrane form an organic integrated body; therefore, the thermal size stability of the modified ceramic diaphragm is improved, and the modified ceramic diaphragm does not contract at a high temperature of 200 DEG C; and in addition, relatively high mechanical performance is still kept, positive and negative electrode contact can be effectively obstructed, and the safety performance of the battery can be guaranteed.

A heat-resistant fiber paper-like sheet comprises 40 to 97% by mass of heat-resistant organic synthetic polymers staple fibers, 3 to 60% by mass of heat resistant organic synthetic polymer fibrid and or an organic resin binder, in a portion of the staple fibers, each staple fiber having two flat end faces having an inclining angle of 10 degrees or more from a plane crossing the fiber axis at a right angles, and is useful as a base material for laminate materials for electrical circuit boards.

The invention discloses a filter material and a purpose thereof. The filter material consists of three layers of structures, namely, a filtering surface layer, a non-filtering surface layer and an intermediate fabric enhancing layer. The filtering surface layer is a fiber web that consists of 20-80wt% heat resistance fibers of which the diameter is less than or equal to 10mum and 20-80wt% heat resistance fibers of which the diameter is more than 10mum and less than or equal to 20mum in a layering manner, wherein the fibers of which the diameter is less than or equal to 10mum is used as an upper layer; the non-filtering surface layer is a fiber web which consists of heat resistance fibers with special-shaped sections, the diameter of which is 10-200mum; and the intermediate fabric enhancing layer consists of heat resistance fibers. The filter material has the effects that the filtering performance is good, the mechanical strength is high, the loss of pressure is less, and the cycle time is long, and has the advanatage that the service life of the filter material can be prolonged.

The invention relates to a blend superfine fiber diaphragm for a lithium ion battery. The blend superfine fiber diaphragm is characterized by comprising polyvinylidene fluoride, cellulose acetate and polyhedral oligomeric silsesquioxane. The polyhedral oligomeric silsesquioxane is one of alkyl silsesquioxane, alkenyl silsesquioxane or aryl silsesquioxane. The blend superfine fiber diaphragm provided by the invention has good hydrophilcity, high strength and excellent thermal size stability; the solution absorbing rate of the blend superfine fiber diaphragm is 300-900 percent, the thermal shrinkage rate of the blend superfine fiber diaphragm is smaller than 5 percent, the specific capacity of a gel polymer lithium ion battery assembled by adopting the blend superfine fiber diaphragm reaches 200-220 mAh.g<-1>, and the lithium intercalation utilization rate of an anode material LiCoO2 can reach above 70 percent.

To provide a biaxially oriented polyester film, particularly a biaxially oriented polyester film for forming members which is useful as a substrate in producing metallic forming members by metal vapor deposition or as a surface protective film in the forming of decorative sheets. [MEANS FOR SOLVING PROBLEMS] A biaxially oriented polyester film for forming members, which is an at least two-ply laminate constituted of a layer (A) made of a polyester (A) and a layer (B) made of a polyester (B) wherein the interlaminar strength between the layers (A) and (B) is 5 N / 15mm or above and the stress values (F100 values) at 100% elongation in the lengthwise and widthwise directions at 200 DEG C and 150 DEG C are 1 to 50 MPa.

Provided are: a composite fiber which comprises a resin containing polyphenylene sulfide as the main component and has excellent thermal adhesion properties while keeping thermal dimensional stability thereof; and a non-woven fabric. A composite fiber mainly composed of a component (A) and a component (B), wherein the component (A) is a resin containing polyphenylene sulfide as the main component and the component (B) is a resin containing polyphenylene sulfide as the main component and having a higher melt flow rate than that of the component (A), and wherein at least a part of the surface of the fiber is formed from the component (B).

Provided are a polyphenylene sulfide fiber including a PPS resin as a main component and having both excellent heat resistance and excellent thermal bonding properties, and a nonwoven fabric including the fiber. The polyphenylene sulfide fiber includes polyphenylene sulfide as a main component and having the sum of the crystallinity and the rigid amorphous fraction of 30% to 90%. The crystallinity is preferably not less than 5% and less than 25%. The polyphenylene sulfide fiber is used to form a nonwoven fabric. The nonwoven fabric is preferably produced by consolidation by thermal bonding or mechanical entanglement.

The invention relates to the technical field of preparation of specific membranes, and particularly relates to a biaxial orientation type polyphenylene sulfide composite membrane with good toughness and excellent heat resistance. The composite membrane comprises the following components: membrane-grade polyphenylene resin, an organic elastomer and an inorganic filler, wherein the membrane-grade polyphenylene resin comprises membrane-grade polyphenylene resin for a master batch and membrane-grade polyphenylene resin for casting of a sheet. The biaxial orientation type polyphenylene sulfide composite membrane prepared by adopting the technical scheme provided by the invention has excellent heat resistance, size stability, thermal formability and toughness. The biaxial orientation type polyphenylene sulfide composite membrane disclosed by the invention can be applied to fields of electric insulating materials or forming materials for a motor, a transformer, an insulating cable and the like, a circuit substrate material, a loudspeaker vibrating plate for a mobile phone and the like.